在英语句子中,主语谓语用逗号隔开是什么句型

主语和谓语之间一般不加逗号.如果主语和谓语之间有逗号,那么,就不止一个,应该有两个的.如：The man, my uncle, often helps me with my studies.（my uncle是同位语）The man, who is my uncle, often helps me with...